[Filesystem | WCM] 9339 fix stat on url for filesystem copy

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #9339 
| License       | MIT
| Doc PR        | na

supersedes https://github.com/symfony/symfony/pull/9863